Projected-light screen.



A. D. BRIXEY. PROJECTED LIGHT'SCREEN. APPLICATION FILED APR. so, 1915.

1,269,046. Patented June 11, 1918.

' PLA TIN/ZED GLASS is a speci Ill v protected and a AUSTIN mar BBIXEY, or new Your, 1:. Y.

PROJECTED-LIGHT SCREEN.

Specification of Letters Patent.

Patented June 11, 1918.

I Applicationfilcd Apri130, 1915. Serial No. 24,895.

lb ait whom it may concern:

Be it known that I, AUSTIN DAY BRIxuY, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Projected-Ligfiht Screens, of which the following" cation.

This invention relates to means whereby a image or design may be reproduced a distance through the instrumentality of projected light. It is of great valuein relation to the re roduction of colore' pictures (red, green, lue, etc.) but is not limited thereto.

{.e present invention relates more parto screen for the purpose descrw n screen is of the transmission t pe; that is, observer upon opposite sides of the screen, being transmitted through the screen the eye of the observer.

object of the invention is to produce proved form of screen which while it Will transmit the projected light to the eye observer, will not reflect light from the s rface turned toward the observer so that pictures can be exhibited in light as well as dark places, there being no fugitive h reflected to the eye of the observer to intellere with the brilliancy and definition of the projected picture.

The improved screen comprises a translucent medium through which the light is light-absorbing medium interposed between the first mentioned medium and the observer' s eye.

When the translucent medium is a plate having a roughened surface such as sandblasted or ground glass, it is not adapted to produce the best results when combined with a light-absorbing medium. The said medium cannot be intlmately or uniformly associated with the roughened surface of the lass and unevenness of light detracting rom the icture is produced. Where a light-abso ing medium is applied to a separate plate and presented to the roughened surface the contact can only be made at the peaks of the pro'ections and so cannot be intimately or uni ormly associated with the translucent plate. Also, where a light-absorbing medium is applied to the roughened surface instead of to aseparate plate, this usually being applied in the form of a solution, t

to the present invention, an

the source of light and the 4 e liquld would settle into the cavities of the plate while the peaks of the projections would be morethinly covered if not left'bare. The lack of uniformity which would thus result is apparent. According inherently translucent screen is employed. This not only causes a more thorough and uniform difl'usion of light, which makes the picture smooth, but also the surface of the screen may be even, so that the light-absorbing medium maybe brought into intimate and uniform association with the surface of the translucent medium. Unevenness of light and glintin as before referred to, are thus avoided an a smooth picture produced.

This invention is illustrated in the accom panying drawing which is a view showing the picture producing device in section, and the positions of the projector and the eye of the observer with relation thereto.

Referring now to the drawing: A is the eye of the observer, B represents the pictnre visualizing means and Q represents the The platinized glass may be formed as follows z-- A concentrated solution of platinum is brought to a state of crystallizable chlorid upon. which is poured essential oil of lavender. A liquor is formed in which the platinum is held in suspension, and which is placed upon the glass in very thin layers by means of a pencil. Especial care must be taken to avoid dust which is very detrimental to an operation of this kind. The

lass, having been thus coated, is put into a rying-room and then into a muflle of refractory earth or of cast iron. The mufile is hermetically sealed and raised to a red heat. After cooling, the glass is taken out.

The platinized lass is readil transparent to transmitted lig t. The platinized face of the glass should be next the translucent sub- W th the obs rvers eye the picture pm inherently translucent, or V piercing rengect no tight observ r picture end strik r hinch or ct rent coiors which the iie'ht is protected, The hienh oierh eppeering' screen observed by iiected fight (or e inch of it) is chsngeot to those coiors enet sheetes in the various perts which correspond to the picture projected and e eleer enoi opaque reproduction or picture in its true shedies enci colors is pro oiuceci. ihis picture eppeers to the oh server to he upon the surieee oi the ptetinizeci costing on the sicie ooijucent to the gloss It.

The picture produced by the epperetus described is reiievedi oi the intense hriiiienc y heretofore noticed in projected pietures, this intense hriiiiency eleeriy indie eating that the pictures were produced hy intense light, a", 6-, thnt they Were projecteoi; Whereas the relief from the intense britiiency occompiisheu toy the present eppere= tus gives the projected picture the 'eppeer ence of en orciinnry picture heneing upon the Well; or, in other words, or picture of reflection end suhtrection. The picture is therefore pleasing end not tiresome to the eyes, Moreover the pictures een he ezrhih' WVhiie the invention hes been iiiu t nt in what is co ciereet its best r may he einho out departing therefore to sec-in" e n A picture he erposeul eye of the ohsewer comprisinge screen of inherentiy trensiucent tight diii using renterioi enei e iight shsorhing screen ct nizedt gloss interposed between the said iucent screen and the eye of the ohserrer. 2. A. tight transmitting means elepteet to be inserted]. between at source of and the eye of the ohser ler comprising e pints of inherently translucent tight chtiusing neeteriei and e meteillic screen interposeoi be tween seioi trensiucent screen snot eye of the observer tight heing transmitted throu h re seioi rneteiiic screen. the reflects ct i' t from seioi device the eye or the observer being ehsor eei toy $18K 3. A picture visueiizing rneens sciep to be interposed hetrveen e projector th eye of the observer comprising" e screen o inherentiy trensiucent tight otifiusing mate rial snot e light ehsorhing screen interposed between said trensiucent screen end, the eye of the observer. 8t

Siened at New York in the county of New orir enoi Stute of New York 29th eieyot April A. JD. 1915.

AUSTIN DAY Q 

